PENGAPURAN PADA SISTEM BIOFLOC : JENIS-JENIS KAPUR, MANFAAT , DOSIS, DAN KAPAN WAKTUNYA PENGAPURAN

Summary

This video covers the importance and benefits of lime application in aquaculture, specifically in biofloc systems. It discusses how lime affects pH, alkalinity, and calcium levels in water, which are crucial for fish growth. The video explains different types of lime, such as dolomite, agricultural lime, and gypsum, and their use for managing pH fluctuations. It also provides advice on when and how to apply lime for optimal results, including dosing guidelines and tips for maintaining proper water quality throughout the cultivation process. The importance of regular pH monitoring and lime application is emphasized to prevent water quality issues.

Takeaways

• 😀 Lime is essential in aquaculture to enhance calcium levels, increase alkalinity, and stabilize pH in water.
• 😀 Maintaining a pH range of 7-8 is crucial for the healthy growth of fish in aquaculture systems.
• 😀 Lime application helps prevent pH drops and stabilize fluctuations in pH levels.
• 😀 When pH drops below 7, dolomite or agricultural lime (CaCO3) can be used to raise pH levels.
• 😀 For high pH levels, gypsum (CaSO4 · 2H2O) is recommended to lower pH and increase calcium content.
• 😀 Lime applications are more effective when done at night due to cooler temperatures and higher CO2 levels.
• 😀 To prevent pH fluctuations, monitor and adjust alkalinity regularly using lime, especially during the early stages of aquaculture.
• 😀 The dosage of lime depends on the water’s pH level: 100g per cubic meter for pH 6.5-7, and 150g per cubic meter for pH below 6.5.
• 😀 Excess lime dosage will cause a rise in pH up to 8.3, at which point lime will stop dissolving and form deposits, which are harmless.
• 😀 Dolomite and agricultural lime (CaCO3) are popular and affordable choices for aquaculture, but dolomite can affect water color due to its magnesium content.
• 😀 Always proactively monitor pH levels throughout the day to ensure proper water quality and avoid potential issues with fish health.

Q & A

What is the primary purpose of liming in aquaculture?

The primary purpose of liming in aquaculture is to improve water quality by increasing calcium levels, alkalinity, and stabilizing the pH. It is especially beneficial in biofloc systems.

How does liming affect pH in water?

Liming helps adjust and stabilize pH levels in water. It raises the pH when it is too low and can also help manage high pH by balancing alkalinity and calcium concentrations.

What are the key components involved in alkalinity in water?

The key components involved in alkalinity are bicarbonates and carbonates. Bicarbonates are the most abundant, and they play a crucial role in maintaining water quality.

Why is pH considered critical for fish growth in aquaculture?

pH is crucial for fish growth because it affects various biological processes, including nitrification. High or low pH can impact the toxicity of substances like ammonia, which can harm aquatic organisms.

What happens if the pH of the water drops too low?

If the pH drops too low, it can lead to the toxicity of ammonia, making the water harmful for fish. Liming can help raise the pH and restore balance.

Which type of lime is best for raising pH when it drops?

Dolomite and calcium carbonate (CaCO3) are effective for raising pH when it drops. They work gradually but are affordable and efficient in biofloc and shrimp farming.

What should be used when pH fluctuates significantly?

When pH fluctuates significantly, dolomite, calcium carbonate (CaCO3), or soda ash (Na2CO3) can be used to stabilize the pH. Soda ash reacts quickly, but it is more expensive.

How does gypsum help in managing high pH?

Gypsum (calcium sulfate) helps in lowering high pH because it contains sulfuric acid, which can decrease pH while also providing additional calcium to support aquatic life.

Why is it recommended to apply lime at night?

It is recommended to apply lime at night because the water temperature is lower, which reduces the rate of pH fluctuation. Additionally, CO2 levels are higher at night, enhancing the lime's effectiveness.

What is the danger of using quicklime in aquaculture?

Quicklime (calcium oxide) is dangerous in aquaculture because it reacts rapidly and can increase the water temperature, which may harm aquatic life. It is not recommended for use in aquaculture systems.

How often should lime be applied to maintain alkalinity in biofloc systems?

To maintain alkalinity in biofloc systems, lime should be applied weekly. If pH fluctuations are still high, it may be necessary to apply lime every three days until the fluctuations stabilize.